Coring apparatus



Aug. 17, 1943.

P. T. BYNUM CORING APPARATUS Original Filed Oct. 18, 1938 Pink 7.' Bynum.

INVENT OR.

thmughth in erior oi het'zbedy l- Patented Aug- 1 1943 a Eink f. Bynunn .-B e Teiz 'ass s t r slxteenths, to John R. Beasley, and one-eighth' U ONQI'J, both of Beeille ,flem; J

Continuation'of application semi-No. 235,652,; j 1 October 18, 1938; :This application April" 15,1"

sa sme l 1940, Serial No.3235653 v punchin ell-2559 .4) 5f;

"This invention relates to weli diillihg equip ment andparticularly to a meansbyvwhieh same pl es of the formation through which; the Well bore passes may be secured 'iThis applicationis a continuation ofmy co pending'patent applies- .tion, Serial No. 235,652, filed October-T13, 1938 for Hydraulically operated coringjdevice;

The general object of this invention is t'o pro means whereby a sample of the formation maybe taken from aside wall f il bore; Another objectof' this inventionis toqarovidea'rdthe'right' as seen in' Figr. 1; a a a I The-primary pistonis connectedwith'the sece 1 a device by which asampie'ofltheformationmty be se like and mere y by the exertion "of h amuse} pressure. y x

Other. objects and advantages this inv'en cured without rotation of adrill wstem'pr the" s tion will become apparenti-tomthe"following 7 description taken in connection with the accompanying drawing.

Inthe: drawing: j

*Fie'. 1 is a longitudinal sectionarview through a device constructed in accordance with this in:

ention sh wing-the parts in the ositionuthey' into;

occu y dulf-ing the lowering of V the device pera in positioninawellbozteg r 1.2. 4 1 5 enlarged-transverse; sectional view v e tak n alongthe 1inez+z of the same o F sh.-

F 3. ani-enlareedtiansuerse sectional View taken alongthe linea -rein Fig.1.

i has is aside-elevation" Of.j1'1h&'$&ifi3 device in operative position for taking sh wing the. parts aCQlQ-i Referrin v mates the carrier bodywhich may be either a drill stem or any other body upon which the'de vice constructedpin accordance with this inve'nfirst 1, the numerai l de sig 'a'ryicylindef inay' swing lat'eially'withrespect to? J the'primarycylinder 'toward the leit 'as seen in .-;1

Fig; 11 butinay not s'wing out of the alignment with the prima'ry. cylinder to the right because ofthe lower extension 9 on' thefprimany cylinder which serves ja's'flan' abutment and limits-the swinging movement of thesecondaryjicylindei t'osuitable meanssuch as the threadedcon'nection shQ'W'I I. The join tedi' conduit -iust': described serves V-thed ouble purpose of transmitting thrust from theprimary piston 4 to the secondary-cylin a der'fi and of transmitting pressure fluid from the space above the primary piston'd into space;

' wit-hi'n'the secondary cylinder 8. It will be noted that the piston'fl and the 'ine'rnb jer'lfi areboth o 'provided' wiith c'entral openings sothat'fpressuref tion is adapted tobe loweredinto'the well.- Such.

body 1 is adaptedjior connection to-thesounce of flu d p essure used in ecurins fluid throu dwell bore; in customary mannerssoithat-yfiuid may be forced fmm such seurce oii pnessure v'c-lewir em d. to he lqwerend of: the body thy,

m ansf fth e ds. a or the ilieis a nrimary W131"? oer shaving a. p mary piston A there n.

p i g 5 i pirev dedthe hwenpoitioof he .pr m rycyiinder 3 :for constantly uiging', the

piston, Anpwardly; The: lower end of this s'p'i-ing 5 on any"suitable-abutmentsuch as the p ns: 6 lSQ 'carried'lby the. primary j cylinders; 3.1

-Ei. 1 &d flla point 1 to one'xside of the-oenten'. 0f h primarycylinder-e is aseoondary cylinder- 7 3 which extends downwardly a substantialdis- V tratedbyf'meansfoff a sh ar pin" '2! orthe-l-ikei '50 fiuidmay pass entirely through this assembly. Sli-dably mounted Within the secondarycylinde'rflis a'secondaryfpiston I5 towhi ch iscon nested a; downwardly. extending core barrel H V Y having a cofe' cutting head It! projecting beyond the-lower 'endof the secondary 'cylinderc and adabted to cut a core in the operation ofthede viceI The piston i6 is provided With a'n opening therethiough the upper end of which isadapted to form a seat for a ball: valve Hi'for shuttingofi .thepa ssage cf fiuid'downwardly through the core barrel "51'; The ball'ls and the opening which it closes are of such 'size-with res'pect to theope'ning through the jointed-conduit [0 that this ball may 'be dropped through the jointed] conduit from the top ofthet-well.

' .The lower end of the secondary,cylindei i iis i yclosed'about the-core barrel by means iof a head:

orbushing 29 which is securedwithinithe lower end of the cylinder and the corebar'rel itself is normally held in; its uppermost position as illus- The core: barrel 1 is provided with the uSuaIQcore Qatcher ZZ just above itslowererid andispro vided with a vent opening 23 adjacent itsupper I end through which fluid-maybe vented during the taking of a core. a

The secondary' cylinder- 8 isprovide'd with lat a hydraulic pressure.

eral openings 24 adjacent the lower end of the cylinder. The fluid passing out through the opening 23 is vented to the exterior of the device through the openings 24 and it is noted that when the secondary piston 16 has passed downwardly to a position. below the uppermost of the openings 24 the pressure fluid will be vented from above this piston, thus snaking it possible for the operator to tell when the core barrel I1 is the well 1 fully extended.

In operation the device is lowered into bore to the position where it is desired to take a core. During this time the ball l9 will not-be in place in the device. 7 applied from the usual source of pressurepsuch Pressure will then. b

- specifiomeans has beenv illustrated for accomplishing the object sought the same is by way of example only and the scope of this invention is to be limited only by the prior art and by the terms of. the appended claims and the illustration given may, therefore, be illustrated both 'as to its partsand its combination parts. It will as' above referred to, and";may,bercirculatedfr through the core barrel in iorde'rto insure that :2

be understood that many changes and alterations may bemade in the parts and combinations set forth within the spirit and scope of the appended claims;

- Iclaim: H

1. Ina coringdevice, a core barrel, hydraulic means for deflecting said core barrel to a posi- 'tion at an angle with respect to a well bore, and

-hydraulicmeans for forcing the core barrel so "deflectedin a direction substantially parallel with pin 2|, this pressure will act upon primary piston ,4 to force the same downwardly against the 7 tension of the spring 5 and to act through the connection ii) to swing theisecondary; cylinder 8 together with the core. barrel i! ,into a lateral p t n ata a s e o t ep m rr Cyl n er, I.

Application of further pressure will act upon the piston l6. and apply force tending to movethe core barrel downwardly within the secondary cylinder 8 and when this force becomes great enough itwill shearthe pin 2| ,andthe core bar rel I! will be forceddownwardly and sidewardly by virtue of the inclinedpesitionof the secondj ary cylinder. Because of this direction of movement the cutting head l8 of the core barrelwill be caused to enter :the formation forming the side wall of the well bore and asthis, cutting head extends into the formation a core ircm' the formation will be received into the core bar-.

rel-. During this reception of the core into the corebarrel, fluid within the core barrel will be vented therefrom and through thejlateral .openings 24,1in the secondary cylinder 8 when the core barrel has. moved downwardly by the desired amount the secondary'piston l6 willjhave passed to a point below, the uppermost of-the openings 24 in the secondary cylinder and-when this pistonpasses below these openings itiwill permit the venting or release of the pressure, fluid which is forcingthe piston downwardly.- This will be indicated to the operator by a speeding up of the pumps which usually provide the source of fluid pres'sureand the operator will thereupon know, that the device has been extended as far as possible. He will thereupon release the'pressure and the spring ,5,wilitend to move theprimary' piston 4 backto its original'position and realign the secondary cylinder 8 with the pri mary' cylinder3. As soon as the .core barrel is 2. In a coring apparatus, a core barrel, hydraulic-means operative by a relatively low fluid pressuref-ordeflecting said core barrel to a' position atyaniangle'with respect toa, well bore,

and hydraulic means operative bya higher fluid pressure for forcing said core barrel ahead in a direction substantially parallel toits axis in such deflectedposition- I 7 3. Ina coring'apparatus, a core barrel, hy-

draulic means. operative. by a relatively low fluid pressure for-deflecting said core barrelwith respect to a-well-.bore,.means ,for retaining said corebarrel against axial movement by such relatively. low. pressure and adapted to be overcome by ahigher pressure to permitsaid'corebarrel to bethereafter moved in an axial position, and hydraulic'means operative by such higher pressurev for forcing said .core barrel in-an axial direction in its deflected position.

4. In acoring apparatus, a core barreL'hydraulic means operative by relatively. low fluid pressure for deflecting said corebarrelto' aposition at an angle to the axis of'a well bore,

hydraulic'means operativeby' a higher pressure forforcing said core barrel'ahead in a direction substantially parallel to its ax-is in its deflected position, and means for releasing-rsaid fluid-pressure'when said core barrel has been extended a predetermined'amount. i V I 5. In a coring apparatus, a ,carrierQa 'core barrel guide hinged to s'aid carrier, a core-barrel slidably mounted in'said guide and having a cutting head,*means for deflecting said guide with said core barrel therein to a position out of alignment withv said carrier, and means for-urg- "ing said core barrel outwardly in a direction towards its-cutting head-when in such deflected position." V

6. A hydraulically operated well coring device,

' said device comprising an upper cylinder having a piston working therein, a lower cylinder nor-' mally axially. aligned with the upper cylinder, an eccentrichinge connectionbetween the upper cylinder and the lower cylinder enabling the lower cylinder to. swing relative to" the upper at any, point within a. well andthat such sampies may be taken without'any-rotation oi the drill stem or thelike but. merely by the. use of cylinder-to a diagonal position i'n-a'well in which the device has been lowered for acoring operation, a cylinder headin. said lower cylinder, conduitmeans between'said piston and said cylin der 'head'jointed. thereto and establishing hydrariliclcommunication between the upper cylinderabove said pistoniand the" lower cylinder belowsaid cylinder head, and a core barrel projectable through the lower 'end of said lower cylinder and having a piston working in said lower cylinder. I v

' 7. A hydraulically operated well coring device,

said device comprising an upper cylinder having a piston working therein, a lower cylinder normally axially aligned with the upper cylinder, an eccentric hinge connection between the 7 upper cylinder and the lower cy1inder,-enabling the lower cylinder to swing relative to the upper cylinder to a diagonal position in a, well in which the device has been lowered for a coring operation, a cylinder head in' said lower cylinder, conduit means between said piston and said cylinder head jointed thereto and establishing hydraulic communication between the upper cylinder above said piston and the lower cylinder below said cylinder head, a core barrel projectable through the lower end of said lower cylinder and having a piston working in said lower cylinder, and shearable means on said lower cylinder holding said core barrel in retracted position.

8. A hydraulically operated well coring device, said device comprising an upper cylinder having a piston working therein, a lower cylinder normally axially aligned with the upper cylinder, an eccentric hinge connection between the upper cylinder and the lower cylinder enabling the lower cylinder to swing relative to the upper cyl- 9. A hydraulically operated well coring device, said device comprising an upper cylinder having a piston working therein, a lower cylinder normally axially aligned with the upper cylinder, an eccentric hinge connection between the upper cylinder and the lower cylinder enabling the lower cylinder to swing relative to the upper cylinder to a diagonal position in a well in which inder to a diagonal position in a well in which the device has been lowered for a coringoperation, a cylinder head in said lower cylinder, conduit means between said piston and said cylinder head jointed thereto and establishing hy-- draulic communication between the upper cylinder above'said piston and the lower cylinder below said cylinder head, a core barrel projectable through the lower end of said lower cylinder and havin a piston Working in said lower cylinder, and shearable means in said lower cylinder holding said core barrel in retracted position, the side walls of said lower cylinder being formed with vent holes in longitudinallyspaced arrangement to indicate the progress of the projection of the core barrel from the lower cylinder subsequent to the shearing of said shearable means.

the'device has been lowered for a coring operaf tion, a cylinder head in said lower cylinder, conduit means between said piston and said cylinder head jointed thereto and establishing hydraulic communication between the upper cyl-f inder above said piston and the lower cylinder below said cylinder head, a core barrel projectable through the lower end of said lower cylinder and having a piston working in said lower tion, a cylinder head in said lower cylinder, conduit means between said piston and said cylin der head jointed thereto and establishing hydraulic communication between the upper cylinder above said piston and the lower cylinder below said cylinder head, a core barrel project 7 V able through the lower end of said'lower cylinder and having a piston working in said lower 1 cylinder, said conduit means comprising a non- V flexible tube and ball and socket joint connections at its opposite ends with said piston and said cylinder head respectively.

, PINK T. BYNUM; a 

